Great musicians who should have been famous except....

It's true jazz drummers are unknown except to those that travel in that circle. I would consider Billy Cobham famous and recognized for his music and skill. He sells out shows whenever he plays, but isn't known to the general public. 
Drummers like Steve Gadd or Peter Erskine are at the top of their field, yet are unsung heros.

In the drummer vein, Lenny White was, in my view, outstanding when a part of Chick Corea’s band, Return to Forever. What a rhythm section, with White coupled with Stanley Clark!

I just wish guys like Philly Joe Jones had actually gotten paid during their careers.  

Elvin Jones, folks. Check out the lead-in to the third movement (Persuance) of Coltrane’s “A Love Supreme”, then look at pix from the studio date and the modest size of Jones’ kit... stunning.

Jack DeJohnette, too. Check out how he uses the tuning of his drums to contribute not only rhythmically, but also melodically, on Michael Brecker’s “original rays” on Brecker’s first release on impulse records.

and finally, if you are ever in NYC and have a chance to see any band that includes Lewis Nash on drums, drop everything and go!!!

Elvin Jones, Philly Joe Jones, 
Jack DeJohnette. There is one big difference...DeJohnette got paid very well.